Simpson Strong-Tie makes the metal pieces that keep buildings from falling apart. Their product line includes structural connectors, joist hangers, anchors, and related hardware, known for high quality and durability. When you’re building in Montana’s seismic zones, dealing with heavy snow loads, or fighting moisture from spring melt, their connectors provide the specific load ratings and corrosion resistance you need.
They’re not a screws-and-bolts company trying to dabble in structural hardware. Simpson Manufacturing started with wood connectors and expanded into comprehensive building solutions. That 70-year focus shows in their engineering — every connector comes with detailed load tables, deflection values, and installation specs that actually mean something when you’re submitting plans to building departments.
Hold-Downs and Hurricane Ties: The Heavy Lifters
The HDU series hold-downs deliver serious uplift resistance — HDU8 handles 6,765-7,870 lbs in Douglas Fir/Southern Pine, while the HDU11 pushes that to 11,175 lbs allowable tension load. Their pre-deflected design virtually eliminates deflection under load, and they use SDS screws instead of bolts for faster installation.
Those numbers matter when you’re building near the Rocky Mountain Front where chinook winds rip through, or in the Mission Valley where the Mission Fault demands seismic considerations. The pre-deflected design is brilliant — it takes the stretch out of the equation before the connector ever sees a load.
Hurricane ties like the H10A provide 1,340 lbs allowable uplift in DF/SP with 375 lbs lateral load capacity. The 18-gauge steel comes with embossments for added stiffness, and the U-shaped design secures both sides of rafters. ZMAX coating is available for corrosion resistance.
Skip the basic galvanized versions if you’re using treated lumber or building anywhere moisture is a concern. Spring for the ZMAX coating — it’s worth every penny when you’re dealing with Montana’s freeze-thaw cycles.
Structural Screws and Fasteners: More Than Just Big Screws
The SDWS structural wood screws feature 0.220” diameter with a SawTooth point that eliminates pre-drilling in most wood species. The T40 drive reduces cam-out and extends bit life. They’re ICC-ES approved for ledger connections per 2015/2018 IRC/IBC codes.
Double-barrier coating on exterior models equals hot-dip galvanizing performance. That’s not marketing fluff — it’s the difference between callbacks and satisfied customers when those deck ledgers see their tenth Montana winter.
The connector screws deserve their own mention. Simpson’s #9 x 1-1/2” screws (SD9112R100) specifically replace nails in their connectors, delivering higher shear load capacity than 10d common nails. The hex head with integrated 0.370-inch washer reduces cam-out, and the mechanically galvanized coating (Class 55, ASTM B695) handles interior and most exterior conditions.
Here’s what contractors actually care about:
| Product | Key Specs | Real-World Application |
|---|---|---|
| SDWS 0.22x4” | T40 drive, SawTooth point, no pre-drilling needed | Deck ledgers, beam connections |
| SD9112R100 | #9 x 1-1/2”, hex drive, higher shear than 10d nails | Joist hangers, hurricane ties |
| #10 2-1/2” Quik Guard | T25 drive, tan coating, 35% more screws per battery charge | Treated decking, exterior trim |
Joist Hangers and Column Bases: Foundation to Framing
Simpson’s hanger lineup runs from light-duty to serious steel. The LUS210 uses 18-gauge steel with double-shear nailing for higher capacity, while the LU210 handles standard loads with 20-gauge steel. Speed prongs allow hands-free installation, and ZMAX coating is available for treated lumber and exterior use.
The gauge difference between LUS and LU matters. Don’t cheap out with 20-gauge hangers when your plans call for 18-gauge — inspectors catch that, and the load difference is real.
Column bases like the CB44 use 7-gauge steel construction with G90 hot-dip galvanized finish standard. The 1-inch standoff prevents post-end rot from moisture — critical when snow sits against deck posts for four months straight. The ABA series adds lateral adjustment for precise placement, which beats shimming and grinding when your anchor bolts aren’t quite where they should be.
Column base options:
| Feature | Standard CB Series | Adjustable ABA Series |
|---|---|---|
| Standoff height | 1 inch | 1 inch |
| Steel gauge | 7-gauge | Varies by model |
| Lateral adjustment | None | Yes |
| Corrosion protection | Hot-dip galvanized options | Hot-dip galvanized options |
Beyond Individual Connectors
Simpson Strong-Tie is known for offering a comprehensive suite of products and solutions primarily focused on structural fastening, connectors, and building hardware for wood, steel, and concrete construction. They’re not just selling brackets — they’re providing engineered solutions with the testing data to back them up.
The company earned an A ranking for seven consecutive years from David Weekley Homes and is one of only two companies to have maintained this level of excellence across all 13 years of the Partners of Choice award program. That’s not a popularity contest — it’s based on delivering products that work, when promised, with the support to back them up.
Their mass timber and CLT connectors show where they’re headed. While they made their name with joist hangers, they’ve expanded into cold-formed steel products, mass timber solutions, and truss plates. The mass timber work matters here — log home country needs connectors that handle the unique loads and connections of heavy timber construction.
The Bottom Line
Simpson Strong-Tie provides the structural connectors Montana construction demands: specific load ratings, proven corrosion resistance, and installation details that work in this climate. Their connectors cost more than generic hardware store brackets. They’re also engineered, tested, and backed by a company that’s been doing this since Eisenhower was president.
For structural connections that matter — deck ledgers, hold-downs, joist hangers supporting snow loads — Simpson’s worth the premium. For basic utility connections where failure just means inconvenience, save your money. But when the connection keeps the building standing or the deck attached, their engineering data and consistent quality justify the price.
Frequently Asked Questions
Q: What’s the real difference between Simpson’s galvanized and ZMAX coatings?
Standard galvanized (G90) works fine for interior use and limited exterior exposure. ZMAX coating has about 2.5 times the zinc thickness and is required by code for use with ACQ treated lumber. In Montana’s climate, ZMAX is cheap insurance against corrosion, especially anywhere moisture accumulates — under decks, at grade level, or in contact with treated wood. The price difference is minimal compared to callback costs.
Q: Are Simpson’s structural screws really better than using lag bolts?
Simpson’s SDWS screws eliminate pre-drilling in most wood species and come with ICC-ES approval for ledger connections. They install faster than lags (no pilot holes), create less splitting, and the double-barrier coating matches hot-dip galvanizing. The main advantage is installation speed and reduced wood damage. For critical structural connections, follow the engineer’s specs regardless of fastener preference.
Q: Which gauge joist hanger should be used for different applications?
Simpson makes both 18-gauge (LUS series) with double-shear nailing for higher capacity and 20-gauge (LU series) for standard loads. Your plans should specify the required series. When in doubt, use the heavier gauge — the cost difference is negligible, and over-building connections is better than explaining a failure. For 2x10 and larger joists carrying floor loads, lean toward 18-gauge.
Q: Are pre-deflected hold-downs necessary for all applications?
Pre-deflected hold-downs virtually eliminate deflection under load. In conventional hold-downs, the wood shrinks and the metal stretches, creating slack in the system. Pre-deflected models compensate for this before installation. For shear walls and critical uplift connections, they’re worth it. For basic post-to-concrete connections with minimal uplift loads, standard hold-downs work fine.
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